Click on Start, search cmd, and click on Run as Administrator. This will open an elevated Command Prompt, here; run this command: manage-bde -protectors -get C: All the Bitlocker recovery keys stored ...
All this is assuming you can still boot into Windows 11/10 in a regular way. If you cannot, the only way is to use a bootable USB drive. You can then use the advanced recovery. Reset Windows Format ...